Question: which railway company in transport have least operating income?
Paraphrase: Name the railway company that has the lowest income.
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q249556 . ?ent wdt:P3362 ?obj . ?ent wdt:P452 wd:Q3565868} ORDER BY ASC(?obj)LIMIT 5 
Answer: Amtrak, Leo Express Global, Yamal Railway, Yakutian Railway